Blender Crashes When I Open A File
In my experience, when working with blend files that no longer work any more for whatever reason, sometimes you can append them into a blank blender file. Since yours is rather large, you might want to try it parts at a time.
I'd try first with the file that you do have access to, and if that still doesn't work, try again with an autosave or the .blend1 file. Hope this helps!